6566566423 has 4 divisors (see below), whose sum is σ = 6567149368. Its totient is φ = 6565983480.

The previous prime is 6566566411. The next prime is 6566566427. The reversal of 6566566423 is 3246656656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6566566423 - 2¹³ = 6566558231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566566427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274236 + ... + 297217.

It is an arithmetic number, because the mean of its divisors is an integer number (1641787342).

Almost surely, 2^6566566423 is an apocalyptic number.

6566566423 is a deficient number, since it is larger than the sum of its proper divisors (582945).

6566566423 is a wasteful number, since it uses less digits than its factorization.

6566566423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582944.

The product of its digits is 4665600, while the sum is 49.

The square root of 6566566423 is about 81034.3533509091. The cubic root of 6566566423 is about 1872.6047207421.

The spelling of 6566566423 in words is "six billion, five hundred sixty-six million, five hundred sixty-six thousand, four hundred twenty-three".